Rotary piston machine



y 7, 1964 G. JUNGBLUTH ROTARY PISTON MACHINE Filed March 4, 1963 Invan/or:

United States Patent M 3,139,836 ROTARY PISTON MACHINE Georg Jungbluth,Cologne-Deutz, Germany, assignor to Kltickner-Humboldt-DeutzAktiengesellschaft, Cologne,

Germany Filed Mar. 4, 1963, Ser. No. 263,091 Claims priority,application Germany Mar. 3, 1962 3 Claims. (Cl. 103-402) The presentinvention relates to a rotary piston machine which comprises an outerbody with inner toothlike contour and an inner body with tooth-likeouter contour in cooperation with the tooth-like contour of the outerbody. More specifically, the present invention relates to a rotarypiston machine of the above mentioned type in which the inner contour ofthe outer body is formed by a thin-walled bushing inserted in a housingwhile the openings to be connected to the inlet and outlet manifolds areprovided in said bushing.

With a rotary piston machine of the above mentioned general type, thesaid manifolds are connected from the outside to the outer body.

It is an object of the present invention to connect such manifolds in animproved manner with the respective openings in the bushing.

It is another object of this invention to provide an arrangement as setforth in the preceding paragraph which is simple in construction andreliable.

It is a still further object of this invention to provide an arrangementas set forth in the preceding paragraphs, in which the bushing will berelieved of all forces which might be caused by heat expansion or byouter forces which may be conveyed through the exhaust manifold.

These and other objects and advantages of the invention will appear moreclearly from the attached drawing illustrating in section a portion of arotary piston machine having its outer body provided with a bushingaccording to the present invention.

The above mentioned objects have been realized according to the presentinvention by a construction which is characterized primarily in that theouter body, which comprises a housing member and a bushing within saidhousing member, has conduit means sealingly inserted in a correspondingbore of said housing member and mounted upon a portion of the bushingconfining opening means to be connected to the respective manifold.

More specifically, referring to the drawings, the outer body generallydesignated A comprises a housing member 1 and a bushing 3 arrangedwithin said housing member 1 and having its inner surface 2 provided incustomary manner with tooth-like surfaces (not shown) for cooperationwith corresponding outer surfaces of the rotor R (a portion thereof onlybeing shown). While the arrangement according to the invention may applyboth to the inlet opening and the outlet opening of a rotary pistonmachine, it will be described only in connection with the outlet opening4 inasmuch as the structure is the same also for use in connection withthe inlet opening.

As will be evident from the drawing, the outlet or exhaust opening 4communicates with the exhaust manifold 5 connected in any convenientmanner, for instance by screws 17, to the housing member 1. Thecommunication between the exhaust manifold 5 and the exhaust opening 4is established by a tubular member 7.

3,139,836 Patented July 7., 1964 The tubular member 7 is by means offlanges 10 mounted on flange-like extensions 9 on the bushing i3 and isconnected thereto by screws 11. The tubular member 7 is furthermoreprovided with a flange 7a the peripheral portion of which has recessmeans 7b carrying sealing means, for instance in the form of a roundrubber seal 12. In this way, the tubular member 7 sealingly engages thebore 8 of the housing member 1. As will be evident from the drawing, thetubular member 7 is adapted to displace itself in bore 8 to the extentthat it is necessary under the influence of heat expansion.

As will furthermore be evident from the drawing, the tubular member 7has a collar 14 by means of which it extends into the cylindrical bore15 of the manifold con nection 16. The said collar 14 is provided withannular grooves having arranged therein piston rings 18 for sealing theouter peripheral surface of collar 14 with regard to the bore 15. Collar14 is adapted to displace itself in the cylindrical bore 15 ofconnection 16 to the extent it is necessary by heat expansion. It is, ofcourse, to be understood that, if desired, the collar 14 may also bereplaced by any suitable yieldable connection.

As shown in the drawing, the bushing 3 which is rather thin-walledconfines with housing member 1 a chamber 19 which represents a coolingchamber. This cooling chamber communicates vw'th a chamber 20 adapted toreceive a cooling medium and surrounding the tubu lar member 7.

The connection of the exhaust manifold 5 to the exhaust opening 4 inconformity with the present invention yields a reliable seal of thecooling chambers while the thin-walled bushing 3 is relieved from allforces which might occur in view of heat expansion. It is also obviousfrom the drawing that any forces which might occur on the outside of themachine cannot be conveyed to the thin-walled bushing 3 through themanifold 5.

If the thin-Walled bushing 3 is provided with an inlet opening, thearrangement described above in connection with the outlet opening 4 maybe duplicated for connecing such inlet opening to the respective inletmanifold.

It is, of course, to be understood that the present invention is, by nomeans, limited to the particular construction shown in the drawing butalso comprises any modifications within the scope of the appendedclaims. It is furthermore to be understood that the invention is notlimited to rotary piston internal combustion engines but is alsoapplicable to rotary piston engines such as compressors and pumps.

What I claim is:

1. A rotary piston machine which includes a rotor and an outer bodycomprising a housing member and a bushlng arranged within said housingmember and provided with an inner surface for cooperation with saidrotor, said bushing having passage means therein for the passage of afluid medium therethrough, said housing member being provided with abore, conduit means connected to said bushing and confining a conduitcommunicating with said passage means, and manifold means mounted on andconnected to said housing member, said conduit means having a peripheralportion sealingly engaging said bore and also having an extension freelyexpandably extending into and engaging said manifold means.

2. A rotary piston machine according to claim 1, in which said extensionsealingly engages said manifold means.

3. In a rotary piston machine in which an outer body has inner surfacemeans for cooperation with the rotor of the rotary piston machine: saidouter body comprising a housing member and a bushing arranged withinsaid housing member and provided with an inner surface for cooperationwith said rotor, said bushing confining with said outer body a coolingchamber, said bushing having passage means therein for the passage of afluid medium therethrough, said housing member being provided with abore, a tubular member mounted on said bushing and arranged within saidbore and having a peripheral portion in sealing arrangement with saidbore, another peripheral portion of said tubular member confining withsaid bore a cooling medium receiving chamber communicating with saidcooling chamber, said tubular member confining conduit meanscommunicating with said passage means, and manifold means mounted on andconnected to said housing member, said tubular member having anextension freely expandably extending into said manifold means.

References Cited in the file of this patent UNITED STATES PATENTS1,079,384 Wilson Nov. 25, 1913 2,292,331 Vertson Aug. 4, 1942 2,307,851Musick et a1. Jan. 12, 1943 2,528,739 Carey Nov. 7, 1950

1. A ROTARY PISTON MACHINE WHICH INCLUDES A ROTOR AND AN OUTER BODYCOMPRISING A HOUSING MEMBER AND A BUSHING ARRANGED WITHIN SAID HOUSINGMEMBER AND PROVIDED WITH AN INNER SURFACE FOR COOPERATION WITH SAIDROTOR, SAID BUSHING HAVING PASSAGE MEANS THEREIN FOR THE PASSAGE OF AFLUID MEDIUM THERETHROUGH, SAID HOUSING MEMBER BEING PROVIDED WITH ABORE, CONDUIT MEANS CONNECTED TO SAID BUSHING AND CONFINING A CONDUITCOMMUNICATING WITH SAID PASSAGE MEANS, AND MANIFOLD MEANS MOUNTED ON ANDCONNECTED TO SAID HOUSING MEMBER, SAID CONDUIT MEANS HAVING A PERIPHERALPORTION SEALINGLY ENGAGING SAID BORE AND ALSO HAVING AN EXTENSION FREELYEXPANDABLY EXTENDING INTO AND ENGAGING SAID MANIFOLD MEANS.